Rave Reports Developer Reference

TRvRenderPreview. OnZoomChange event (read/write/published)

Declaration

procedure OnZoomChange(Sender: TObject);

Category

Preview

Description

This event will be called whenever the current zoom factor changes for the preview screen. This can be useful for updating the current zoom factor on visual controls on the preview screen.

NOTE:

If an OnZoomChange event handler is created, it is responsible for redrawing the page by calling RedrawPage.

See also

TRvRenderPreview Class, RedrawPage, ZoomIn, ZoomOut

Example Delphi

procedure TRpPreviewForm.RvRenderPreview1ZoomChange(Sender: TObject);

var   S1: string[10];

begin

Str(RvRenderPreview1.ZoomFactor:1:1,S1);

ZoomEdit.Text := S1;

RvRenderPreview1.RedrawPage;

end;

Example (C++Builder)

void __fastcall TForm1::RvRenderPreview1ZoomChange(TObject *Sender)

{

AnsiString S1;

S1 = FloatToStrF(RvRenderPreview1->ZoomFactor, ffGeneral,1,1);

ZoomEdit->Text = S1;

RvRenderPreview1->RedrawPage();

}